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3 years ago

What happens to potential energy as the car goes up the hill?

Physics

2 answers:

True [87]3 years ago

8 0

The potential energy will increase

Norma-Jean [14]3 years ago

3 0

As a car goes up a hill, gravitational potential energy increases and kinetic energy decreases. I hope this helps!

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A 200g of iron at 120 degrees and a 150 g piece of copper at -50 degrees are dropped into an insulated beaker containing 300 g o

kodGreya [7K]

Answer:

T = 15.03°C

Explanation:

given data:

copper specific heat = Sc = 0.385 J/g °C

iron specific iron = Si = 0.450 J/g °C

specific heat of ethanol = Se = 2.46 J/g °C

net heat loss is equal to zero

$(m*S*\Delta T)_{copper} +(m*S*\Delta T)_ {iron} +(m*S*\Delta T)_ {ethanol} = 0$

$150*0.385 *( T - (-50)) + 200*0.450*(T - 120) + 300*2.46 * (T -20) = 0$

$57.75( T - (-50)) + 0.90(T - 120) +738(T -20) = 0$

$57.75T + 2887.5 + 0.90T - 108 + 738T - 14760 = 0$

$57.75T + 0.90T+738T = - 2887.5 + 108+14760$

$796.65T= 11980.5$

T = 15.03°C

4 0

3 years ago

What is an place where an individual bird lives, called? I need help ASAP

Rama09 [41]

Answer:

A nest

Explanation:

Even When a bird lives alone it is called a nest.

Hope this answer is useful.

6 0

4 years ago

Read 2 more answers

A force F acting on an object of mass m causes a displacement d. The angle between these two vectors is Θ. The work W done on th

777dan777 [17]

Work:
$W= \int\limits^b_a {F.} \, ds$

F: force
ds: displacement

Assuming the work is constant:

$W= \int\limits^b_a {F.} \, ds = F . d = F * cos\theta * d$

d displacement

4 0

3 years ago

HELP QUICK! Please can anyone do the other half for me

IrinaVladis [17]

Answer:

9) c

10) c

11) d

12) d

Explanation:

I think it's helps you

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3 years ago

When light with a wavelength of 238 nm is incident on a certain metal surface, electrons are ejected with a maximum kinetic ener

erastova [34]

Answer:

The wavelength is 173 nm.

Explanation:

This kind of phenomenon is known as photoelectric effect, it occurs when photons of light inside the metal surface and if they have the right amount of energy electrons absorb it and got expelled from the metal as photo electrons. The maximum kinetic energy of that photo electrons is given by the expression:

$K_{max} =E_{photon} - \Phi$ (1)

With E the energy of the photon and Φ the work function of the material. The work function is a value characteristic of each material and is related with how much the electron is attached to the material, the energy of the photon is the Planck's constant (h= $6.63\times10^{-34}$ ) times the frequency of light ( $\nu$ ) , then (1) is: